Suppose you are traveling in your car at speed S and you

Chapter 7, Problem 7.2.14

(choose chapter or problem)

Suppose you are traveling in your car at speed S and you suddenly brake hard, leaving skid marks on the road. A rule of thumb for the distance, D, that the car will skid is given by where D distance the car skids (in feet), S speed of the car (in miles per hour), and f is a number called the coefficient of friction that depends on the road surface and its D 5 S2 30 A 5 100p 7.2 Direct Proportionality: Power Functions with Positive Powers 407 condition. For a dry tar road, For a wet tar road, (We saw a variation of this problem in Section 7.2, Example 7.) a. What is the equation giving distance skidded as a function of speed for a dry tar road? For a wet tar road? b. Generate a small table of values for both functions in part (a), including speeds between 0 and 100 miles per hour. c. Plot both functions on the same grid. d. Why do you think the coefficient of friction is less for a wet road than for a dry road? What effect does this have on the graph in part (c)? e. In the accompanying table, estimate the speed given the distances skidded on dry and on wet tar roads. Describe the method you used to find these numbers. f. If one car is going twice as fast as another when they both jam on the brakes, how much farther will the faster car skid? Explain. Does your answer depend on whether the road is dry or wet?

Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.

Becoming a subscriber
Or look for another answer

×

Login

Login or Sign up for access to all of our study tools and educational content!

Forgot password?
Register Now

×

Register

Sign up for access to all content on our site!

Or login if you already have an account

×

Reset password

If you have an active account we’ll send you an e-mail for password recovery

Or login if you have your password back